Phone (301) 953-2014 Fax (301) 498-0554
Dear Customer:
We at Jolida want to take this opportunity to thank you for purchasing the JD 502B Integrated Stereo
Tube Amplifier. The company that stands behind your amplifier draws on a decade of tube design
and manufacturing experience. In addition to our engineering knowledge, Jolida is committed to
provide its customers with the highest level of quality sound at an affordable price. Jolida has
achieved this goal through modern design, quality parts, expert craftsmanship and strict attention to
efficient purchasing and production. We are confident that your amplifier will provide you with years
of listening pleasure.
Before using this unit, please take the time to carefully read and understand the safety instructions
and operating procedures before you install or attempt to operate your JD 502B integrated amplifier.
Becoming familiar with important facts about your amplifier and its correct operation will help assure
safe usage, maximum musical satisfaction, and reliable operation. Take special care to follow the
warnings indicated on the unit itself as well as the safety suggestions found in the owner's manual.
Be sure to read the section on tube layout which gives information on tube replacement and biasing.
The effort you invest now will be well rewarded as time goes by.
Sincerely
Jolida, Inc.
Table of Contents
Section Page No.
Safety Precautions 3, 4
Getting Started
About Your Amplifier 5
Construction and Testing 5
Packaging/Unpacking 5, 6
Accessories 6
Preparation for Use 6
Operating Procedures 6
Controls and Their Functions 7
Connections 8
Vacuum Tube Layout: 9,10
Tube Replacement 10
Biasing 10, 11, 12, 13
Servicing 13
Warranty and Conditions 14
Technical Specifications 15
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